h1{
  
  font-size:100px;
  text-align: right;
  border:2px solid green;
  width:1000px;
  height:700px;
  /* background-color: grey ;
  background-image: url("../img/baidu.png") ;
  background-repeat: no-repeat;
  background-position: 50% 50%; */
  background: grey url("../img/baidu.png") no-repeat 20px 50%;
}
h1 span{
  color:red;
}
div{
  border:1px solid red;
}
#div2{
  width:200px;
  height: 200px;
  background-color: grey;
  position: relative;
  top:50px;
  left:50px;
  z-index: 2;
}

#div3{
  width:200px;
  height: 200px;
  background-color: green;
}